396 Broken Valve Spring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MACO · 11-26-2017, 02:50 AM

My 69 C20 396 started to run poorly, it turns out the #3 exhaust valve spring is broken. I understand that Chey's will break valve springs from time to time. The same #3 valve spring was replaced in 2013 before I owned the truck. Does it seem odd the #3 exhaust spring would break 2 times? The previous owner has the engine professionally rebuilt since the first time the spring broke. (not sure if valve springs were replaced) It has a mild crane 901 cam, Edlebrock performer manifold and carb. Replace the one spring or a whole new set?

11-26-2017, 02:50 AM	#1
MACO Registered User Join Date: Sep 2005 Location: British Columbia CANADA Posts: 118	396 Broken Valve Spring My 69 C20 396 started to run poorly, it turns out the #3 exhaust valve spring is broken. I understand that Chey's will break valve springs from time to time. The same #3 valve spring was replaced in 2013 before I owned the truck. Does it seem odd the #3 exhaust spring would break 2 times? The previous owner has the engine professionally rebuilt since the first time the spring broke. (not sure if valve springs were replaced) It has a mild crane 901 cam, Edlebrock performer manifold and carb. Replace the one spring or a whole new set? Attached Images __________________ 1969 C20 Customer Camper CST, 396, TH400, Factory A/C, Olive Green.



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